Euryale \Eu*ry"a*le\, n. [NL., fr. Euryale, one of the Gorgons.] 1. (Bot.) A genus of water lilies, growing in India and China. The only species ({E. ferox}) is very prickly on the peduncles and calyx. The rootstocks and seeds are used as food. 2. (Zo["o]l) A genus of ophiurans with much-branched arms.